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Finding the Fourth Proportional to 7,249,966.80, 10,878,886.80 and 2,990,565.60

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Solution

The fourth proportional to 7,249,966.80, 10,878,886.80 and 2,990,565.60 is: 4,487,472.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,249,966.80 : 10,878,886.80 = 2,990,565.60 : x
  2. Step 2: Convert to fraction form
    7,249,966.80/10,878,886.80 = 2,990,565.60/x
  3. Step 3: Cross multiply
    7,249,966.80x = 10,878,886.80 × 2,990,565.60
  4. Step 4: Simplify right side
    7,249,966.80x = 32,534,024,630,374.08
  5. Step 5: Solve for x
    x = 32,534,024,630,374.08/7,249,966.80
  6. Step 6: Final answer
    x = 4,487,472.22

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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.