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Finding the Fourth Proportional to 661,323.08, 912,710.25 and 389,416.26

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Solution

The fourth proportional to 661,323.08, 912,710.25 and 389,416.26 is: 537,444.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,323.08 : 912,710.25 = 389,416.26 : x
  2. Step 2: Convert to fraction form
    661,323.08/912,710.25 = 389,416.26/x
  3. Step 3: Cross multiply
    661,323.08x = 912,710.25 × 389,416.26
  4. Step 4: Simplify right side
    661,323.08x = 355,424,212,018.67
  5. Step 5: Solve for x
    x = 355,424,212,018.67/661,323.08
  6. Step 6: Final answer
    x = 537,444.14

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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.