Finding the Fourth Proportional to 661,119,421.80, 991,679,132.70 and 620,808,637.80
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Solution
The fourth proportional to 661,119,421.80, 991,679,132.70 and 620,808,637.80 is: 931,212,956.70
Step by Step Solution
- Step 1: Write the proportion equation
661,119,421.80 : 991,679,132.70 = 620,808,637.80 : x - Step 2: Convert to fraction form
661,119,421.80/991,679,132.70 = 620,808,637.80/x - Step 3: Cross multiply
661,119,421.80x = 991,679,132.70 × 620,808,637.80 - Step 4: Simplify right side
661,119,421.80x = 615,642,971,506,172,416 - Step 5: Solve for x
x = 615,642,971,506,172,416/661,119,421.80 - Step 6: Final answer
x = 931,212,956.70
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Double scale
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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.