Home / 917,878.20-1,376,817.30-286,985.40

Finding the Fourth Proportional to 917,878.20, 1,376,817.30 and 286,985.40

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Solution

The fourth proportional to 917,878.20, 1,376,817.30 and 286,985.40 is: 430,478.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,878.20 : 1,376,817.30 = 286,985.40 : x
  2. Step 2: Convert to fraction form
    917,878.20/1,376,817.30 = 286,985.40/x
  3. Step 3: Cross multiply
    917,878.20x = 1,376,817.30 × 286,985.40
  4. Step 4: Simplify right side
    917,878.20x = 395,126,463,567.42
  5. Step 5: Solve for x
    x = 395,126,463,567.42/917,878.20
  6. Step 6: Final answer
    x = 430,478.10

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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.