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Finding the Fourth Proportional to 917,064.80, 1,374,430.80 and 442,728.80

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Solution

The fourth proportional to 917,064.80, 1,374,430.80 and 442,728.80 is: 663,530.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,064.80 : 1,374,430.80 = 442,728.80 : x
  2. Step 2: Convert to fraction form
    917,064.80/1,374,430.80 = 442,728.80/x
  3. Step 3: Cross multiply
    917,064.80x = 1,374,430.80 × 442,728.80
  4. Step 4: Simplify right side
    917,064.80x = 608,500,098,767.04
  5. Step 5: Solve for x
    x = 608,500,098,767.04/917,064.80
  6. Step 6: Final answer
    x = 663,530.10

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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.