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Finding the Fourth Proportional to 390,030.30, 546,779.70 and 390,030.30

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Solution

The fourth proportional to 390,030.30, 546,779.70 and 390,030.30 is: 546,779.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,030.30 : 546,779.70 = 390,030.30 : x
  2. Step 2: Convert to fraction form
    390,030.30/546,779.70 = 390,030.30/x
  3. Step 3: Cross multiply
    390,030.30x = 546,779.70 × 390,030.30
  4. Step 4: Simplify right side
    390,030.30x = 213,260,650,424.91
  5. Step 5: Solve for x
    x = 213,260,650,424.91/390,030.30
  6. Step 6: Final answer
    x = 546,779.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.