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Finding the Fourth Proportional to 607,128.60, 910,109.70 and 472,117.80

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Solution

The fourth proportional to 607,128.60, 910,109.70 and 472,117.80 is: 707,723.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    607,128.60 : 910,109.70 = 472,117.80 : x
  2. Step 2: Convert to fraction form
    607,128.60/910,109.70 = 472,117.80/x
  3. Step 3: Cross multiply
    607,128.60x = 910,109.70 × 472,117.80
  4. Step 4: Simplify right side
    607,128.60x = 429,678,989,322.66
  5. Step 5: Solve for x
    x = 429,678,989,322.66/607,128.60
  6. Step 6: Final answer
    x = 707,723.19

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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.