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Finding the Fourth Proportional to 977,407.80, 1,466,111.70 and 346,385.40

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Solution

The fourth proportional to 977,407.80, 1,466,111.70 and 346,385.40 is: 519,578.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    977,407.80 : 1,466,111.70 = 346,385.40 : x
  2. Step 2: Convert to fraction form
    977,407.80/1,466,111.70 = 346,385.40/x
  3. Step 3: Cross multiply
    977,407.80x = 1,466,111.70 × 346,385.40
  4. Step 4: Simplify right side
    977,407.80x = 507,839,687,649.18
  5. Step 5: Solve for x
    x = 507,839,687,649.18/977,407.80
  6. Step 6: Final answer
    x = 519,578.10

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.