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Finding the Fourth Proportional to 571,439.19, 788,587.19 and 316,790.37

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Solution

The fourth proportional to 571,439.19, 788,587.19 and 316,790.37 is: 437,171.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,439.19 : 788,587.19 = 316,790.37 : x
  2. Step 2: Convert to fraction form
    571,439.19/788,587.19 = 316,790.37/x
  3. Step 3: Cross multiply
    571,439.19x = 788,587.19 × 316,790.37
  4. Step 4: Simplify right side
    571,439.19x = 249,816,826,113.41
  5. Step 5: Solve for x
    x = 249,816,826,113.41/571,439.19
  6. Step 6: Final answer
    x = 437,171.32

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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.