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Finding the Fourth Proportional to 877,259.16, 1,210,809.60 and 555,398.40

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Solution

The fourth proportional to 877,259.16, 1,210,809.60 and 555,398.40 is: 766,571.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    877,259.16 : 1,210,809.60 = 555,398.40 : x
  2. Step 2: Convert to fraction form
    877,259.16/1,210,809.60 = 555,398.40/x
  3. Step 3: Cross multiply
    877,259.16x = 1,210,809.60 × 555,398.40
  4. Step 4: Simplify right side
    877,259.16x = 672,481,714,544.64
  5. Step 5: Solve for x
    x = 672,481,714,544.64/877,259.16
  6. Step 6: Final answer
    x = 766,571.32

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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.