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Finding the Fourth Proportional to 486,209.40, 728,730.90 and 249,430.20

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Solution

The fourth proportional to 486,209.40, 728,730.90 and 249,430.20 is: 373,846.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,209.40 : 728,730.90 = 249,430.20 : x
  2. Step 2: Convert to fraction form
    486,209.40/728,730.90 = 249,430.20/x
  3. Step 3: Cross multiply
    486,209.40x = 728,730.90 × 249,430.20
  4. Step 4: Simplify right side
    486,209.40x = 181,767,494,133.18
  5. Step 5: Solve for x
    x = 181,767,494,133.18/486,209.40
  6. Step 6: Final answer
    x = 373,846.11

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1.5x scale

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.