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Finding the Fourth Proportional to 571,503.69, 788,683.98 and 313,404.21

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Solution

The fourth proportional to 571,503.69, 788,683.98 and 313,404.21 is: 432,502.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,503.69 : 788,683.98 = 313,404.21 : x
  2. Step 2: Convert to fraction form
    571,503.69/788,683.98 = 313,404.21/x
  3. Step 3: Cross multiply
    571,503.69x = 788,683.98 × 313,404.21
  4. Step 4: Simplify right side
    571,503.69x = 247,176,880,866.82
  5. Step 5: Solve for x
    x = 247,176,880,866.82/571,503.69
  6. Step 6: Final answer
    x = 432,502.69

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.